The metabolic theory of mental health that nobody in the industry wants you to hear

Your mental health is a metabolic problem.

That's not a hot take or an oversimplification. It's the conclusion of decades of research that the mental health industry has largely ignored, and it explains why most people never fully recover from anxiety, depression, or brain fog despite years of treatment.

If you’ve ever felt like your brain was working against you — the fog, the crashes, the emotional reactivity that seems to come from nowhere — and you’ve tried the meditation, the therapy, maybe even the medication, and you’re still not where you want to be, what I’m about to walk through will reframe the entire problem.

We’ll start with a story that should be impossible.

A woman named Mildred was diagnosed with schizophrenia at seventeen and spent the next fifty-three years hearing voices every single day. She tried every medication psychiatry could offer across five decades, tried to kill herself multiple times, and at one point a court took away her right to make her own decisions because she couldn’t function. She was seventy years old and weighed 330 pounds.

Then a doctor suggested she try a ketogenic diet for her weight. Not for her mental health — nobody was even thinking about that anymore. High fat, no sugar, no processed food.

Within two weeks, she could hear birds outside her window. She said the voices had been drowning them out for so long she’d forgotten they existed. Within months, her symptoms went into full remission, she stopped every medication, lost 150 pounds, fired the guardian, and took her life back. Thirteen years later she’s still symptom-free.

That story comes from a book called Brain Energy by Dr. Christopher Palmer, a psychiatrist at Harvard who spent decades watching the mental health system fail people and finally asked a question his colleagues weren’t asking: what if mental illness isn’t a brain chemistry problem, but an energy problem?

The answer to that question changes everything about how you think about your own brain. Let me show you why.

The mental health industry has been aiming at the wrong target

“I spent thirteen years at NIMH really pushing on the neuroscience and genetics of mental disorders, and when I look back on that I realize that while I succeeded at getting lots of really cool papers published by cool scientists at fairly large costs — I think $20 billion — I don’t think we moved the needle in reducing suicide, reducing hospitalizations, improving recovery for the tens of millions of people who have mental illness.”

– Dr. Tom Insel, former director of the National Institute of Mental Health

That’s the man who ran the entire field admitting that $20 billion in research didn’t change outcomes. And the data supports it — 90% of people treated for depression still have symptoms after twelve years of treatment. Depression is now the leading cause of disability on the planet, above heart disease and cancer.

The standard model says mental illness is a chemical imbalance — serotonin too low, dopamine too high, something floating around in the brain that needs correcting with medication. And medications do help some people, that’s real. But the fact that the vast majority of patients don’t fully recover after years of treatment suggests that the chemical imbalance theory is capturing a symptom, not a cause.

Palmer’s theory, backed by research from neurology, endocrinology, and metabolic science, is that mental disorders are metabolic disorders. Your brain cells aren’t misfiring because of some mysterious chemical glitch — they’re running out of energy because the engines that power them are damaged.

And the primary thing damaging those engines is what you eat.

Your brain cells run on engines, and your food is destroying them

If you took a biology class at any point in your life, you probably heard “mitochondria are the powerhouse of the cell” and immediately forgot about it. Turns out that throwaway line from high school is one of the most important facts about your body.

Every cell has mitochondria — tiny engines that turn food and oxygen into ATP, which is the energy currency your cells run on. Your brain is absurdly energy-hungry (it uses about 20% of your body’s total energy despite being 2% of your body weight), so when those engines work, your brain works. You think clearly, regulate emotions, sustain focus, and handle stress without spiraling. When those engines are damaged, you get fog, anxiety, depression, reactivity, and that particular kind of flatness where nothing is technically wrong but nothing feels right either.

Here’s where it gets practical. When you eat food that inflames your gut — processed food, sugar, seed oils — your body launches an inflammatory response that sends signals directly to your brain via the vagus nerve and cytokines. Your mitochondria start dealing with the inflammatory load instead of producing energy. Your gut (which produces about 90% of your body’s serotonin, by the way — not your brain) reduces serotonin output. Blood sugar spikes and crashes, and research shows that during the crash, processing speed, memory, and attention all decrease while sadness and anxiety increase. That’s not over months. That’s within hours of a single meal.

Do that every day for years and the damage becomes your baseline. You stop noticing it because you forgot what normal feels like, and then you describe “anxiety” to your doctor and walk out with a prescription that targets the downstream effect of a problem that started in your kitchen.

The mental health system is treating the brain while the fire is in the gut. Palmer’s book walks through the research in exhaustive detail, but the core insight is simple: fix the metabolism, and the brain fixes itself. That’s what happened to Mildred.

Why adding more protocols will never fix this

This is where Palmer’s research connects to something I’ve been living for years, and it’s the core of everything I teach.

The entire self-improvement industry runs on addition. You feel stuck, so you add meditation. Still stuck, so you add breathwork. Then a morning routine. Then cold showers. Then therapy. Then supplements. Then a dopamine detox. Each addition implicitly confirms a belief that runs underneath all of it: something is wrong with me and I need more tools to fix it.

I did this for years. Meditation, breathwork, coaching, journaling — the whole stack. And I made progress, I’m not going to pretend I didn’t. But there was always this low-level static underneath everything, this persistent restlessness that no amount of inner work could reach.

Then I changed my food. Eliminated the processed stuff, the sugar, the seed oils. Went high fat, clean protein, almost zero carbs for 30 days.

Within weeks, something shifted that years of practice couldn’t touch. The static dropped. The restlessness I thought was psychological turned out to be physiological — my body had been generating the noise the whole time, and my mind was just reacting to it. I was trying to find peace on a nervous system that was on fire.

That realization reframed everything.

What if most of what you’re struggling with isn’t something you need another tool for? What if it’s something you need to remove? Inflammation. Blood sugar chaos. Foods that are actively destroying the engines that power your brain.

Every wisdom tradition points at this — the Buddhists call it your original nature, Advaita calls it the Self, the Kabbalists call it the Neshamah — the divine spark that was never damaged, only concealed. The idea that you were never broken, just buried. Palmer’s research gave us the metabolic explanation for why the burial happens and how to reverse it.

I call it Liberation Through Subtraction. You don’t build your way to wholeness. You remove what’s covering it. And the metabolic layer — your food — is the foundation that everything else sits on top of. Fix that first and the meditation works better, the breathwork goes deeper, the emotional regulation actually sticks. Skip it and you’re building on sand.

What actually changes when the engine runs clean

I want to be specific about this because vague promises about “more energy” and “better mood” are useless.

You sit down at 9am to work on the thing you’ve been putting off for weeks and the resistance isn’t there. Your brain just shows up. The work comes out. You look up and two hours passed and you didn’t check your phone once.

3pm hits and you’re still sharp. No crash. No coffee negotiation. No scrolling to restart your brain. The engine didn’t stall because the fuel is clean.

Your partner says something that would have sent you into your head for two hours last month, and the charge just isn’t there. You hear her, you respond, and she notices that something is different even though neither of you says anything about it.

And I want to be honest — I still get triggered. I still have rough days. But a rough day used to cost me a whole week of spiraling. Now it’s a rough afternoon and I’m back. That shift didn’t come from discipline or a better morning routine. It came from the hardware finally running on the right fuel.

The 30-day elimination protocol

If you want to test this, the simplest version is to remove processed food, sugar, seed oils, and grains for 30 days. Keep net carbs under 20-30g. Eat meat, fish, eggs, animal fat, olive oil, and small amounts of vegetables.

The first week is uncomfortable. Your body is switching fuel systems and your digestion needs time to catch up. You might feel tired, get headaches, or have digestive changes. This is the adaptation phase, not a sign that something’s wrong.

By week two, the fog starts lifting. By week three, you start to realize you’ve been living at maybe 40% of your capacity and calling it normal.

The hard part isn’t the information — you now have that. The hard part is the implementation. Knowing what mitochondria are doesn’t tell you what to eat tomorrow morning, and knowing sugar causes inflammation doesn’t rewire twenty years of eating habits.

That’s why I built a community around this — daily check-ins, real-time adjustments, someone who’s been on both sides of it walking next to you through the 30 days. If this letter resonated, check it out here: My Skool Community.

All love,

– Tomas